minor #1659 [Icons] Accept <twig:ux:icon /> (lowercase) (smnandre)

This PR was squashed before being merged into the 2.x branch.

Discussion
----------

[Icons] Accept <twig:ux:icon /> (lowercase)

| Q             | A
| ------------- | ---
| Bug fix?      | no
| New feature?  | no
| Issues        | Fix #1657
| License       | MIT

Fix #1657

Allow

```
<twig:UX:Icon ... />
```

and

```
<twig:ux:icon ... />
```

Commits
-------

9c037b4 [Icons] Accept <twig:ux:icon /> (lowercase)

Author: kbond

src/Icons/src/Twig/UXIconComponentListener.php

@@ -28,7 +28,7 @@ public function __construct(
 
     public function onPreCreateForRender(PreCreateForRenderEvent $event): void
     {
-        if ('UX:Icon' !== $event->getName()) {
+        if ('ux:icon' !== strtolower($event->getName())) {
             return;
         }
 

src/Icons/tests/Fixtures/templates/template1.html.twig

@@ -3,7 +3,7 @@
     <li id="second">{{ ux_icon('user') }}</li>
     <li id="third">{{ ux_icon('sub:check', {'data-action': 'string "with" quotes'}) }}</li>
     <li id="fifth"><twig:UX:Icon name="user" class="h-8 w-8" /></li>
-    <li id="sixth"><twig:UX:Icon name="sub:check" /></li>
-    <li id="seventh"><twig:UX:Icon :name="'sub:'~'check'" /></li>
+    <li id="sixth"><twig:ux:icon name="sub:check" /></li>
+    <li id="seventh"><twig:Ux:Icon :name="'sub:'~'check'" /></li>
     <li id="eighth">{{ ux_icon('iconamoon:3d-duotone') }}</li>
 </ul>